钙镁离子及重碳酸盐对零价铁还原对氯硝基苯的影响

通过间歇式实验,考察了地下水中常见硬度离子Ca2＋、Mg2＋及HCO3-的独立作用和联合作用对零价铁还原对氯硝基苯的影响。实验结果表明,Ca2＋、Mg2＋对零价铁还原对氯硝基苯反应的促进作用不明显。HCO3-浓度为0～100mg/L时可显著提高零价铁还原对氯硝基苯的速率,反应2 h后对氯硝基苯转化率由44.1%升至84.8%;当HCO 3-浓度大于100 mg/L时,促进作用会由于碳酸铁盐类物质的产生而下降。当Ca2＋或Mg2＋与HCO3-共存时,会产生碳酸钙或碳酸镁之类的沉淀物,占据还原位点,不利于反应的进行。当采用零价铁修复地下水氯硝基苯化合物污染时,应考虑地下水硬度的影响。     

康复新联合复方氯已定治疗压疮性溃疡的临床观察

目的探讨康复新联合复方氯已定含漱液用于治疗压疮性溃疡的临床疗效。方法选取压疮性溃疡患者120例,随机分为两组。观察组给予康复新与复方氯已定联合用药进行治疗;对照组给予复方氯已定治疗。治疗4 d后,分别观察两组的治疗效果。结果观察组临床症状的改善和有效率明显优于对照组。结论康复新与复方氯已定联合用药提高了压疮性溃疡的治疗效果,并且缩短了病程。     

改性沸石法去除微污染水中氮的研究

以氨氮浓度大约为5mg/L的微污染水为研究对象,其COD浓度低于20mg/L,以开发适合我国国情的废水脱氮技术为目标,对沸石离子交换去除氨氮的处理工艺进行了探讨,并对其改性处理效果及再生效果进行了试验研究.结果表明:改性沸石对氨氮有较好的吸附,吸附温度为常温,NaC1溶液、NH4N03溶液改性沸石的最佳浓度分别为0.6-1mol/L、1.5-2mol/L,氨氮的去除率迭90%.     

他克莫司与复方氯已定联合治疗扁平苔藓的效果观察

目的观察他克莫司与复方氯已定联合治疗口腔扁平苔藓的临床疗效。方法选择口腔扁平苔藓患者56例,随机分为两组。试验组采用他克莫司与复方氯已定联合用药进行治疗;对照组仅用复方氯已定治疗。结果治疗5周后,试验组的临床症状改善和有效率明显优于对照组。结论他克莫司与复方氯已定联合用药取得了良好的临床效果。     

生长素对菊花试管苗生根的影响

以菊花茎尖培养而成的试管苗作为试材，研究了不同种类及不同质量浓度的生长素（NAA、IAA、IBA）对菊花试管苗生根的影响，结果表明，生长素IBA对诱导根的发生及提高生根质量综合效果最佳，其最适质量浓度为1．5mg/L；生长素NAA对根烃生长的影响明显，根系最粗壮；IAA 对根的伸长生长效果明显，但根的综合质量差，根系最细弱。菊花试管苗最佳生根培养基配方为1／2ms IBA1.5mg/L。     

仿制药与原研药头孢哌酮复方制剂对产ESBL肠杆菌的作用效果

目的 探讨仿制药与原研药头孢哌酮复方制剂其配方比值对产超广谱β-内酰胺酶(ESBL)肠杆菌科细菌的体外最低抑菌浓度及效果。方法 回顾性研究2017年4月至2020年2月于攀枝花市中心医院确诊为急性细菌性感染且经细菌培养鉴定为产ESBL肠杆菌科细菌感染患者100例作为研究对象。将50例接受原研药头孢哌酮舒巴坦治疗患者纳入观察组;50例接受仿制药头孢哌酮舒巴坦治疗患者纳入对照组。比较两组临床治疗效果、体外抑菌效果、不良反应及成本-效果比值(C/E)。结果 观察组与对照组细菌清除率分别为82.00%、78.00%,差异无统计学意义(χ²=0.250,P=0.617);观察组和对照组的有效率分别为44.00%、48.00%,差异无统计学意义(χ²=1.190,P=0.275);观察组与对照组大肠埃希菌MIC90均为32 mg/L,肺炎克雷伯菌MIC90均为32 mg/L,铜绿假单胞菌MIC90均为40 mg/L,鲍曼不动杆菌MIC90均为40 mg/L,变形杆菌MIC90均为16 mg/L;观察组与对照组药物最低抑菌浓度比较差异无统计学意义(P>...     

电化学絮凝与化学絮凝法联合处理油田污水的实验分析

在油田污水处理中,为减少絮凝剂的用量,分析采用电化学絮凝与化学絮凝法联合处理油田聚驱污水.通过正交实验确定电化学絮凝的最佳实验条件:电极板间距为9mm,电解时间为16min,电流密度为1000 A/m2.电化学絮凝与絮凝剂PAC联合处理聚驱污水后,可使PAC的加剂质量浓度减小660mg/L,上清液透光率接近99.0%;电化学絮凝与絮凝剂CPAM联合处理聚驱污水后,可使CPAM的加剂质量浓度减小192 mg/L,上清液透光率接近99.0%.且经联合处理后污水中絮体量小,易于后续过程处理.     

有机改性膨润土处理印染废水

本研究采用经十六烷基三甲基溴化铵溶液改性的膨润土处理合成直接耐晒黑G废水,得到使用2500mg/L改性剂改性的膨润土投加重为2500mg/L,T=25℃,t=60min时,处理废水的效果最佳,色度和COD去除率分别79.69%和14.25%.     

芦荟的组培快繁

本研究以华芦荟（Aloe chinensis (Haw.)Baker)为试材，进行组培快繁实验，研究了激素对不定芽诱导、试管苗繁殖、试管苗生根等的影响，同时对驯化栽培的基质进行了筛选。研究结果表明，对芦荟不定芽诱导效果最佳的以及试管苗增殖率最高的培养基一致，均为MS＋6－BA4mg/L NAA0.5mg/L(PH5.8-6.0,食糖3％，琼脂0．8％），芦荟试管苗月增殖率为19．60倍，年增殖率可达6400万倍。最佳生殖培养基为1／2MS＋NAA2mg/L；最佳驯化栽培基质为河沙。     

巴氯芬联合腺苷钴胺治疗三叉神经痛的效果

目的 探讨三叉神经痛患者实施巴氯芬联合腺苷钴胺治疗的临床效果。方法 选取2019年6月至2020年10月于丹东市第一医院接受诊治的78例三叉神经痛患者作为研究对象,运用随机抽签法分为对照组与观察组,各39例。对照组患者应用巴氯芬单独治疗,观察组患者应用巴氯芬同时联合腺苷钴胺治疗,比较两组的治疗效果。结果 治疗后观察组白细胞介素-1β、白细胞介素-6以及肿瘤坏死因子-α水平低于对照组,差异有统计学意义（P<0.05）;治疗后观察组谷胱甘肽过氧化物酶以及以及超氧化物歧化酶水平高于对照组,差异有统计学意义（P<0.05）;治疗后,观察组疼痛程度评分低于对照组,差异有统计学意义（P<0.05）;观察组临床治疗有效率明显高于对照组,差异有统计学意义（P<0.05）。结论 通过运用巴氯芬与腺苷钴胺联合治疗的方式能够进一步促进三叉神经痛患者临床治疗效果的提升,其应用价值突出。     

John Stuart Mill's Theory Of Justice

John Stuart Mill has traditionally been portrayed as self-contradictory and failing to construct a unified social theory. Recent scholarship, however, has challenged this view, finding Mill's work to be creatively synthetic in bridging the antinomies inherent in liberal democratic thought. This revisionist interpretation of Mill is advanced by an understanding of his theory of justice and its role in shaping his policy positions on issues such as welfare, education, voting rights, property rights, taxation, government intervention, and the future of capitalism.     

A Rich Vein for “Reality Mining”北大核心CSSCISSCI

Arik Hesseldahl In the aftermath of the September 11 attacks, U.S. officials quickly turned their attention to other potential targets, including California's Golden Gate Bridge. What would happen if terrorists took down the bridge between San Francisco and Marin County? How much of the region would be affected and for how long?     

John Stuart Mill's Theories of Wealth and Income Distribution

Although he was much influenced by David Ricardo when he wrote the classical part of his Principles , John Stuart Mill was not a Ricardian when he penned his theories of wealth and distribution. They are based on a triple foundation. First, a belief that economics is a moral discipline. Second a theory of custom-driven human behavior. Third, an empirically formed conviction that the institutions of state, education and business cooperate to structure the distribution of income. On the basis of these presuppositions, Mill formulated 1) an institutional theory of the formation of human and non-human wealth and 2) an even more institutional theory of distribution demonstrating how the aforementioned institutions malignantly skew the distribution of income to the advantage of the propertied classes and to the extreme disadvantage of the working class. As a social economist, Mill recommended institutional reforms designed to eradicate the poverty of the working class.     

中国养活自己能力的长期预测:技术和政策分析

中国拥有世界五分之一强的人口 ,收入又在迅速增长。因此 ,国际上很自然地会考虑或推测她在今后的几十年是否有能力养活自己。中国的人口预计将从 2 0 0 0年的 1 2 8亿增长到 2 0 2 0年的 1 4 6亿 ,和 2 0 3 0年的 1 4 9亿。与此同时 ,人均收入的增长将导致对家畜和鱼类产品更大的需求 ,因而对饲料的需求也将有很大的增长     

Toward a Phylogenetic Reconstruction of Organizational Life

Synopsis Classification is an important activity that facilitates theory development in many academic disciplines. Scholars in fields such as organizational science, management science and economics and have long recognized that classification offers an approach for ordering and understanding the diversity of organizational taxa (groups of one or more similar organizational entities). However, even the most prominent organizational classifications have limited utility, as they tend to be shaped by a specific research bias, inadequate units of analysis and a standard neoclassical economic view that does not naturally accommodate the disequilibrium dynamics of modern competition. The result is a relatively large number of individual and unconnected organizational classifications, which tend to ignore the processes of change responsible for organizational diversity. Collectively they fail to provide any sort of universal system for ordering, compiling and presenting knowledge on organizational diversity. This paper has two purposes. First, it reviews the general status of the major theoretical approaches to biological and organizational classification and compares the methods and resulting classifications derived from each approach. Definitions of key terms and a discussion on the three principal schools of biological classification (evolutionary systematics, phenetics and cladistics) are included in this review. Second, this paper aims to encourage critical thinking and debate about the use of the cladistic classification approach for inferring and representing the historical relationships underpinning organizational diversity. This involves examining the feasibility of applying the logic of common ancestry to populations of organizations. Consequently, this paper is exploratory and preparatory in style, with illustrations and assertions concerning the study and classification of organizational diversity.     

Information infrastructure: Who builds broadband networks?

This paper examines the essential difference between the U.S. and Japan, when one considers information infrastructure. There are seven perception gaps between the U.S. and Japan concerning Information Infrastructure policies. These gaps must be understood in order to compare the countries' governmental policies in this area. In looking at the present circumstances, the essential question to answer concerns who is to build, own and operate the network(s) of the infrastructure. Liberalization is certain to be a central factor in the ongoing telecommunications debates. Now that customers have had a taste of the liberalized market-place, the movement toward more open markets will be difficult to stop. When considering options, it is necessary to pay close attention to standardized network access and the increasingly important role software plays. These issues are causing us to take a new approach to the traditional role played by regulators. They also force a closer look at the appropriate structure of utility companies. This paper addresses the above issues in hopes of stimulating dialog on the new telecommunications infrastructure paradigm.     

Nonlinearity in Stock Exchange Markets: The Case of Bist 100 Indices

In this paper,using data for the Bist 100 index,we investigate the presence of nonlinearities by employing several nonlinearity tests.The Brock,Dechert,and Sche...     

Solidified Branding Function: How the Urban Brand Affects a Small Town’s Development? Case Study of Wangqingtuo,Tianjin, China

Chinese small towns are usually developed with single core industry,and the urban brand is the identity of a town that formed with the development of its indust...     

海岛地区产业演替及资源基础分析--以舟山群岛为例

改革开放以来,舟山市产业构成发生了显著变化,其经济发展过程可以划分为三个阶段。1992年前,是以产业结构渔业占绝对地位的单一结构阶段;1993—1998年,以旅游业为主的第三产业快速发展阶段;上世纪末以来,又进入了新一轮的经济发展时期,即工业产值比重快速增加阶段。根据海岛的自然资源基础和特点,在新世纪的经济发展过程中,舟山市应定位为生态型的港口旅游城市。以港口及临港工业为主导,以海岛旅游和海洋经济为特色,大力发展第二产业和第三产业。海岛地区的主导产业应体现海岛资源优势及区位优势,以集群性环保型产业为主。同时由于海岛地区淡水资源缺乏,主导产业也应着重选择低耗水型产业。